// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CC_TREES_DRAW_PROPERTY_UTILS_H_
#define CC_TREES_DRAW_PROPERTY_UTILS_H_

#include "cc/base/cc_export.h"
#include "cc/layers/layer_collections.h"

namespace gfx {
class Rect;
class Transform;
class Vector2dF;
} // namespace gfx

namespace cc {

class Layer;
class LayerImpl;
class LayerTree;
class RenderSurfaceImpl;
class EffectTree;
class TransformTree;
class PropertyTrees;
struct EffectNode;

namespace draw_property_utils {

    void CC_EXPORT PostConcatSurfaceContentsScale(const EffectNode* effect_node,
        gfx::Transform* transform);

    void CC_EXPORT ConcatInverseSurfaceContentsScale(const EffectNode* effect_node,
        gfx::Transform* transform);
    // Computes combined clips for every node in |clip_tree|. This function requires
    // that |transform_tree| has been updated via |ComputeTransforms|.
    void CC_EXPORT ComputeClips(PropertyTrees* property_trees,
        bool non_root_surfaces_enabled);

    // Computes combined (screen space) transforms for every node in the transform
    // tree. This must be done prior to calling |ComputeClips|.
    void CC_EXPORT ComputeTransforms(TransformTree* transform_tree);

    // Computes screen space opacity for every node in the opacity tree.
    void CC_EXPORT ComputeEffects(EffectTree* effect_tree);

    void CC_EXPORT BuildPropertyTreesAndComputeVisibleRects(
        LayerImpl* root_layer,
        const LayerImpl* page_scale_layer,
        const LayerImpl* inner_viewport_scroll_layer,
        const LayerImpl* outer_viewport_scroll_layer,
        const LayerImpl* overscroll_elasticity_layer,
        const gfx::Vector2dF& elastic_overscroll,
        float page_scale_factor,
        float device_scale_factor,
        const gfx::Rect& viewport,
        const gfx::Transform& device_transform,
        bool can_render_to_separate_surface,
        PropertyTrees* property_trees,
        LayerImplList* visible_layer_list);

    void CC_EXPORT UpdatePropertyTrees(PropertyTrees* property_trees,
        bool can_render_to_separate_surface);

    void CC_EXPORT FindLayersThatNeedUpdates(LayerTree* layer_tree,
        const PropertyTrees* property_trees,
        LayerList* update_layer_list);

    void CC_EXPORT ComputeVisibleRects(LayerImpl* root_layer,
        PropertyTrees* property_trees,
        bool can_render_to_separate_surface,
        LayerImplList* visible_layer_list);

    gfx::Rect CC_EXPORT
    ComputeLayerVisibleRectDynamic(const PropertyTrees* property_trees,
        const LayerImpl* layer);
    void CC_EXPORT
    VerifyVisibleRectsCalculations(const LayerImplList& layer_list,
        const PropertyTrees* property_trees);

    void CC_EXPORT ComputeLayerDrawProperties(LayerImpl* layer,
        const PropertyTrees* property_trees);

    void CC_EXPORT ComputeMaskDrawProperties(LayerImpl* mask_layer,
        const PropertyTrees* property_trees);

    void CC_EXPORT ComputeSurfaceDrawProperties(const PropertyTrees* property_trees,
        RenderSurfaceImpl* render_surface);

    bool CC_EXPORT LayerShouldBeSkipped(LayerImpl* layer,
        const TransformTree& transform_tree,
        const EffectTree& effect_tree);

    bool CC_EXPORT LayerNeedsUpdate(Layer* layer,
        bool layer_is_drawn,
        const PropertyTrees* property_trees);

    bool CC_EXPORT LayerNeedsUpdate(LayerImpl* layer,
        bool layer_is_drawn,
        const PropertyTrees* property_trees);

    void CC_EXPORT VerifyClipTreeCalculations(const LayerImplList& layer_list,
        PropertyTrees* property_trees);

    gfx::Transform CC_EXPORT DrawTransform(const LayerImpl* layer,
        const TransformTree& transform_tree,
        const EffectTree& effect_tree);

    gfx::Transform CC_EXPORT ScreenSpaceTransform(const Layer* layer,
        const TransformTree& tree);

    gfx::Transform CC_EXPORT ScreenSpaceTransform(const LayerImpl* layer,
        const TransformTree& tree);

    void CC_EXPORT UpdatePageScaleFactor(PropertyTrees* property_trees,
        const LayerImpl* page_scale_layer,
        float page_scale_factor,
        float device_scale_factor,
        const gfx::Transform device_transform);

    void CC_EXPORT UpdatePageScaleFactor(PropertyTrees* property_trees,
        const Layer* page_scale_layer,
        float page_scale_factor,
        float device_scale_factor,
        const gfx::Transform device_transform);

    void CC_EXPORT
    UpdateElasticOverscroll(PropertyTrees* property_trees,
        const LayerImpl* overscroll_elasticity_layer,
        const gfx::Vector2dF& elastic_overscroll);

    void CC_EXPORT
    UpdateElasticOverscroll(PropertyTrees* property_trees,
        const Layer* overscroll_elasticity_layer,
        const gfx::Vector2dF& elastic_overscroll);

} // namespace draw_property_utils
} // namespace cc

#endif // CC_TREES_DRAW_PROPERTY_UTILS_H_
